© 2019 Thorlabs
3 Operating Instructions
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3.2.5 USB Operation
All PM102x models can be run via the USB port. The USB interface on all PM102x models also
serves to connect the power meter to a power supply and to update firmware of the PM102x.
The PM102U uses the USB interface as the only port for control and output.
Note
In case a USB communication is established in addition to the DA-15 connection, PM102
switches to USB-Mode and the DA-15 serial interface becomes inactive. Only after actively
closing the USB connection, the serial communication is reestablished.
When switching the PM102 from USB to RS232 operation or UART operation, the PM102 uses
the DA-15 interface for control and output.
3.2.6 RS232 Operation
The PM102 can be operated with serial communication via RS232.
Please use a RS232 standard protocol for RS232 communications. For questions, please con-
tact our engineers at Thorlabs.
Please set up the port as follows:
Parameter
Setting
Baud Rate
115.200 Bit/s (default)
Supported range of Baud Rate: 9.600 and 230400 Bit/s
Data Bits
8
Parity
None
Stop Bits
1
Flow Control
None
Termination Character LF (x0A; \n). The termination character needs to be enabled.
Note
PM102:
To operate the PM102 via RS232, RxD, TxD, and GND need to be wired from the DA-15 con-
nector to a 9 Pin female connector to perform the connections.
PM102 DA-15 Pin
Female DE-9 Pin (PC)
Pin7: TxD
Pin2: RxD
Pin8: RxD
Pin3: TxD
Pin15: GND
Pin5: GND
